Mechanical power.



No. 782,011. PATENTBD FEB. '7, 1905. R. DODSON.

MECHANICAL POWER.

APPLIOATION FILED 1730.24, 1903.

Patented February 7. 1905.

PATENT @rrrce.

ROY DODSON, OF KANSAS CITY, MISSOURI.

MECHANICAL POWER.

SPECIFICATION forming part of Letters Patent No. 782,01 1, dated February 7 1905.

Application filed December 24:, 1903.

To (1 17 whom it may concern:

Be it known that I, ROY DoDsoN, a citizen of the United States, residing at Kansas City, in the county of Jackson and State of Missouri. have invented certain new and useful Improvements in Mechanical Power, of which the following is a specification.

My invention relates to improvements in power appliances applicable to derriclts, lifting-jacks, wrenches, &c.; and it consists in the novel arrangement, construction, and combination of parts hereinafter described, and pointed out in the claims.

In the accompanying drawings, which illustrate the invention, Figure 1 represents a perspective view of a derrick embodying the power appliance. Fig. 2 is an enlarged detail view of the vibrating sleeve, its connecting parts, and a portion of the standard upon which it operates. Fig. 3 is a side elevation of a lifting-jack embodying the same. Fig. is a vertical section taken on line III III of Fig. 2. Fig. 5 is aside elevation of a wrench embodying the power appliance.

In Fig. I of said drawings, 1 designates a standard provided with a suitable base 2 and ratchet-teeth 8, which latter are arranged upon its opposite edges. HI designates a sleeve which is slidably mounted upon the standard and adapted to carry the load. 5 designates a vibrating sleeve slidably arranged upon the standard and provided with a segmental up per end 6, which contacts with and supports sleeve &. Vibrating sleeve 5 is provided at its upper enlarged portion '7 with a pair of pawls 8, pivotally secured thereto by pins 9 and held in engagement at theirlower pointed ends with ratchet-teeth 3 by springs II), which latter are secured to the enlarged portion '7 and press against the upper portion of pawls S. Sleeve 5 may be operated by direct pressure of the hand when used for light purposes; but when great power is required it is necessary to employ levers, as shown in I and 2, in which instance one or a pair of levers may be used, as preferred. In Fig. 1 I

have shown a pair of levers 11, secured by pivots 12 to the lower opposite corners of sides 19, and thus vibrate sleeve 0.

Serial No. 186,453.

sleeve 5 and providcd with cam-faces 13, which are alternately brought into contact with the edges ofstandard I,and thus vibrate the sleeve.

\Vhcn the appliance is used on aderrielt, as shown in Fig. I, cables I4: are attached to the outer ends of lovers II. so the latter may be operated from the ground after the appliance has traveled upwardly out of reach. and in order that it may be readily lowered after reaching the upper portion of the standard cables 15 are attached to pawls 8, so the latter may be disengaged from ratchet-teeth 3, and thus permit the appliance to descend. By pulling the extended lever down parallel with the adjacent edge of the standard the opposite lever will be raised to a horizontal position by the transverse movement of the lower portion of sleeve 5, which draws its cam-face I3 into frictional contact with the adjacent edge of the standard, and thus causes said lever to assume a horizontal position by the time the first-mentioned lever is drawn down parallel with the standard.

hen the appliance is used on a lifting-jack, I lind it more convenient to operate with a single lever 11, fulcrumed upon a pin 16, projecting outwardly from the face of a block 17, slidingly arranged in a longitudinal groove 18 in one side of standard 1. Lover 11, is provided at its fulcrumed end with an integral cam I3, adapted to alternately engage the opposite inclined sides 19 of an aperture 20, arranged in the lower portion of vibrating sleeve 5.

In practice sleeve i is placed beneath the load, and lever II is oscillated to alternately bring cam 13 into engagement with inclined This movement of the sleeve causes pawls S to alternately engage the next higher ratchettooth, and thus lift the vibrating sleeve 5, sleeve i", and the load step by step. After sleeve 4 has been relieved of the load it and the vibrating sleeve may be readily lowered by compressing linger-grips 21 on the pawls, which operation will disengage the latter from the ratchet-teeth, and thus permit the sleeves to descend.

WVhen applied to a quick-acting wrench, as shown in Fig. 5, the levers are dispensed with, as it is preferred to immediately push sleeve 5 upwardly on standard l until sleeve or lower jaw 45 is brought into contact with the object, which latter is then reliably held between the jaws P4 by pawls 8 engaging ratchet-teeth 3, and thus preventing the lower jaw from releasing the object.

From the above description it is apparent that I have produced a power appliance which is comparatively simple in construction, easy to operate, and whereby great power may be obtained.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. A mechanical appliance consisting of a standard provided with ratchet-teeth at its opposite edges, a vibrating sleeve loosely embracing said standard and provided with an enlarged segmental upper end, pawls pivotally secured to the enlarged upper portion of the vibrating sleeve and adapted to engage the ratchet-teeth, and a sleeve slidingly mounted upon the standard and resting upon the upper segmental end of the vibrating sleeve.

2. A mechanical appliance consisting of a standard provided at its opposite edges with ratchet-teeth, a vibrating sleeve loosely embracing the standard, cam-levers pivotally secured to the lower portion of said vibrating sleeve, pawls pivotally secured to the upper portion of the vibrating sleeve and adapted to engage the ratchet-teeth, and means for disengaging said pawls from the ratchet-teeth.

3. A mechanical appliance consisting of a standard provided at its opposite edges with ratchet-teeth, a vibrating sleeve loosely embracing the standard, pawls pivotally secured to the vibrating sleeve and adapted to engage the ratchet-teeth, and a sleeve resting upon the vibrating sleeve and loosely embracing the standard.

In testimony whereof I aiiiiX my signature in the presence of two witnesses.

I ROY DODSON.

WVitnesses:

F. G. FISCHER, T. A. HICKEY. 

